2bfrank

Re: Short Questions Thread

.....have been pondering on the Cleisen Rearrangement of c6h5-ch2-ch2-(0-ch3) , following the rearrangement it would make phenylacetone.......it's a question not a fact and what would the ether be called.......java

o-Allylphenol I believe

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Re: Short Questions Thread

« Reply #544 on: May 29, 2010, 02:52:35 AM »

No phenol present

There once were some bees and you took all there stuff!You pissed off the wasp now enough is enough!!!

2bfrank

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Re: Short Questions Thread

« Reply #545 on: May 29, 2010, 07:33:26 PM »

maybe me confused, I thought the reagant was an allyl phenyl ether that would then result in what I said via a claissen rearrangement.

drone1240

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Re: Short Questions Thread

« Reply #546 on: May 29, 2010, 08:36:09 PM »

Two questions please. Do you guys put ice in the water that circulates through your condenser? I did and it makes a mess with all the condensate dripping on table. Is it as simple as adding iodine to propanone to make iodoform?

acting in accordance with the dictates of reason....

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Re: Short Questions Thread

« Reply #547 on: May 29, 2010, 09:13:58 PM »

Woleans website gives detailed instructures on making iodoform so its work a look. I love the idea that it decomposes and subliminates I2 on warming producing clean dry iodine. Something I had my eye on for a while.

IIRC (been a while since I looked into it)Its a matter of taking the normal acetone/NaOCl synthesis for chloroform and adding I2 to a NaOH solution and dripping the Acetone in to yeild a precipitate of iodoform. Iodoform is a solid BTW unlike chloroform.

There once were some bees and you took all there stuff!You pissed off the wasp now enough is enough!!!

Goldmember

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Re: Short Questions Thread

« Reply #548 on: May 30, 2010, 12:27:02 PM »

Can anyone please suggest a good replacement for P205 for drying ethyl acetate well enough for use in a claisen condensation? Not carbonates, dont cut it.

cheers.

« Last Edit: May 30, 2010, 12:28:36 PM by Goldmember »

mumbles

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Re: Short Questions Thread

« Reply #549 on: May 31, 2010, 02:20:48 PM »

Listed drying agents would be K2CO3, P2O5, Na2SO4, calcium hydride, 4A molecular sieve. Should swim assume 3A sieves would also do the job? A distillation just before use and 30min drying with one of the previous agents should be good enough but swim hasn't tried this.

Vesp

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Re: Short Questions Thread

« Reply #550 on: June 03, 2010, 10:20:51 PM »

Hi -- did anyone ever determine the easiest way to go about turning N-acetyl-4-aminophenol (Tylenol, acetaminophen, paracetamol, etc ) into hydroquinone? I believe I had read somewhere that it was possible with only the use of sulfuric acid, leading the aminophenol to hydrolize into hydroquinone and an ammonium sulfate - but I cannot find a reference, and so this may be false. I do want to use nitrite on this, as I have little to none. What would happen if nitrate were used? Guesses?

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NeilPatrickHarris

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Re: Short Questions Thread

Hi -- did anyone ever determine the easiest way to go about turning N-acetyl-4-aminophenol (Tylenol, acetaminophen, paracetamol, etc ) into hydroquinone? I believe I had read somewhere that it was possible with only the use of sulfuric acid, leading the aminophenol to hydrolize into hydroquinone and an ammonium sulfate - but I cannot find a reference, and so this may be false. I do want to use nitrite on this, as I have little to none. What would happen if nitrate were used? Guesses?

i'm missing the post in my hive archive but there's a nice post by Antoncho called "Post 224004 (fructose: "route from acetaminophen (paracetamol)", Chemistry Discourse)" that seems to be MIA. here's another related post, worth a glance but doesn't really answer your question as well as that Antoncho post probably does http://127.0.0.1/rhodium/Rhodium/hive/hiveboard/novel/000466801.html

marakov

Re: Short Questions Thread

Thanks. I am halo-forming right now. I got this really cool leather bound book from barnes and noble and am teaching myself how to take notes as well as per Zubrick's instruction.[/quote

You are studying Zubricks's you are doing correct. The rest is nonsense. You have done correct.

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Re: Short Questions Thread

« Reply #553 on: June 05, 2010, 08:57:48 PM »

Has anyone had success with extracting Vanillin and Ethyl Vanillin from OTC sources using the bisulfate adduct?

There once were some bees and you took all there stuff!You pissed off the wasp now enough is enough!!!

captainrush

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Re: Short Questions Thread

« Reply #554 on: June 07, 2010, 01:20:02 AM »

How would I go about determining if a compound can be steam distilled (peferably through the use of math)?

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Re: Short Questions Thread

« Reply #555 on: June 07, 2010, 01:49:12 AM »

To be basic about it its a function of the vapor pressures of the two substances being co-distilled together. In the case of essential oils its H2O and the oil. If there vapor pressures fall within a given range of each other they will modify each other vapor pressure and co-distill with each other as a zoatrope IIRC(don't quote me on this lst line please iv had a long day).

I hope that helps you find what you need because I have to head out and can't really get much more indepth on it right now but the science and mathmatics of it can be found and the information about should help you get there.

There once were some bees and you took all there stuff!You pissed off the wasp now enough is enough!!!

captainrush

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Re: Short Questions Thread

« Reply #556 on: June 07, 2010, 05:33:41 AM »

Thanks, that was what I thought I remembered. Still tryin to figure out the span of that range but at least I have the tools to solve the problem now.

2bfrank

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Re: Short Questions Thread

« Reply #557 on: June 14, 2010, 12:49:08 AM »

ONe dumbass question

Ratio question.. 50:50 ratio of 90 = 45:45 so 70:30 ratio of 90 = what. I am rushed and cant remember how to do it and it is really needed asap.

Thanks in advance.

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Re: Short Questions Thread

« Reply #558 on: June 14, 2010, 01:10:06 AM »

70% * 90 and 30% * 90 or .7 and .3 * 90

You fall and bump ya head ziggy?

There once were some bees and you took all there stuff!You pissed off the wasp now enough is enough!!!

2bfrank

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Re: Short Questions Thread

« Reply #559 on: June 14, 2010, 01:18:16 AM »

Thanks big time, yeah its a dumbass ??, but Ive got exams for the next 3 days and sort of going blank all the time,(I just cant think) and just couldn't remember how to do it, and needed to know for statistics I am currently revising and started panicking, hence thought Id ask. Its a spin when I go blank, and Not sure what the cause is, Id imagine its pressure and stress one can put one self under at exam times. I need to chill..